Improvement in packing for combining-tubes of injectors for steam-boilers



J. B. HARKINS. PACKING FOR COMBINING TUBES 0F INJECTORS FOR STEAM BOILERS.

No. 195,007, Patented Sept.11,1877.

ATTORNEYS.

UNITED STATES JAMES B. HARKINS, OF ALTOONA, PENNSYLVANIA.

IMPROVEMENT lN PACKING FOR COMBINING-TUBES 0F INJECTORS FOR STEAMBOILERS.

Specification forming part of Letters Patent No. 195,007, dated September 11, 1877 application filed July 23, 1877.

To all whom it may concern Be it known that I, JAMES B. HARKINS, of Altoona, in the county of Blair and State of Pennsylvania, have invented a new and useful Improvement in Packing for Combining- Tubes of Injectors, of which the following is a specification:

Figure l is a longitudinal section on line a: a: in Fig. 2. Fig. 2 is an end view.

Similar letters of reference indicate corresponding parts.

The invention will first be described in connection with the drawing, and then pointed out in the claim.

In the drawing, A is a conical combiningtnbe, similar in all respects to those in common use, except a rabbet, a, formed in the flange thereof, and holes b, extending from the inner surface of the tube to the rabbet in the flange. To the groove on two split rings, 0, are fitted and arranged to break joints, so that steam or water cannot pass through the joints of the rings. Pins d project from the flange of the tube through the joints of the rings, to keep the rings from turning. A collar, e, is secured to the larger end of the tube by screws, and holds the rings 0 in place.

When the injector is in use the outward pressure of the water and steam exerted in the inner'surface of the rings throws them against the barrel of the injector, and prevents water and steam from. passing between the rings and barrel.

The packing thus made and applied re-- inner surface of the tube, whereby the packing is expanded by the pressure of the water, as specified.

JAMES B. HARKINS.

Witnesses:

W. H. ALEXANDER, W. B. WHTTELY. 

